3. Chemical Reactions

When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment, 1.50 g of copper was heated with excess sulfur to yield 1.56 g of copper(I) sulfide. What is the percent yield?

A 0.510 g sample of strontium chloride reacts with sodium carbonate to give 0.455 g of strontium carbonate. What is the percent yield of strontium carbonate in this reaction?

If the percent yield for the following reaction is 75.0% and 35.0 g of NO2 are consumed in the reaction, how many grams of nitric acid, HNO3(aq), are produced?

In a chemical reaction, if the theoretical yield is 50 grams and the actual yield is 40 grams, what is the percent yield?